[ovirt-users] Storage Design Question - GlusterFS

Hello, we are designing a new production cluster, and I have to questsions about GlusterFS please: 1- this quote from the documentation os not clear to me " Creating additional data domains in the same data center as the self-hosted engine storage domain is highly recommended. If you deploy the self-hosted engine in a data center with only one active data storage domain, and that storage domain is corrupted, you will not be able to add new storage domains or remove the corrupted storage domain; you will have to redeploy the self-hosted engine." Does this mean that we should have more than one "Data" domain? or here this paragraph is talking about sharing a single domain for both the hosted-engine and VMs? 2- the documentation mentioned that Replica 1 or Replica 3 are only supported, but is this only for the hosted-engine volume? or also for Data volumes? so the max is only 3? and waht if I wanted to expand capacity later? Thank you,